Rendering painted lines as nodes in Cocos - objective-c

Question

I'm working on a drawing app for iPad using Cocos-iOS and I'm having performance issues with drawing lines as a type of CCNode. I understand that using draw in a node causes it to be called every time the canvas is repainted and the current code is very heavy if used every time:
for (LineNodePoint *point in self.points) {
start = end;
end = point;
if (start && end) {
float distance = ccpDistance(start.point, end.point);
if (distance > 1) {
int d = (int)distance;
float difx = end.point.x - start.point.x;
float dify = end.point.y - start.point.y;
for (int i = 0; i < d; i++) {
float delta = i / distance;
[[self.brush sprite] setPosition:ccp(start.point.x + (difx * delta), start.point.y + (dify * delta))];
[[self.brush sprite] visit];
}
}
}
}
Very heavy...
I either need a better way to draw the lines or to be able to cache the drawing as a raster.
Thanks in advance for any help.

Answer 1

How about ccDrawLine or CCMutableTexture? CCMutableTexture is for manipulating pixels using CCRenderTexture internally as you said.
ccDrawLine
cocos2d for iPhone 1.0.0 API reference
CCMutableTexture
Fast set/getPixel for an opengl texture?
[render texture] pixel manipulation (integrated CCMutableTexture functionality)